Safety Inspections; Fig. 32 Performing An Electrical Safety Inspection - Zeiss VISUREF 100 User Manual

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000000-2006-367-GA-GB-151116
Maintenance and care

Safety inspections

WARNING - RISK OF ELECTRIC SHOCK
If no legal requirements exist in your country, the device must receive an
electrical safety test in accordance with IEC 62353:2007. This test must be
performed and documented by specialists disposing of the according know-
how.
Please proceed as follows to perform a safety check of the device:
• Check the protective earth conductor resistance. To do this, connect the
device to the measuring instrument using the power cable. To perform
the measurement, press the measuring tip to the metallic holding plate
(1, Fig. 32) of the plugs on the bottom of the device. The measured value
may not exceed 0.3 Ω.
1 Metallic holding plate of plugs (measuring point)
Fig. 32 Performing an electrical safety inspection
• After successful measurement, the device leakage current must be
measured. Preferably, the differential current method should be used. The
device should be in operation during the measurement. Press the
measuring tip again to the metallic holding plate (1, Fig. 32) of the plugs.
The measured value may not exceed 0.5 mA.
• Finally, measure the insulation resistance using a test voltage of 500 V.
The measured value may not fall below 2 MΩ.
• Note down the measured values.